Fabrication of BaTiO_3 Micropatterns by a Combination of Laser-Induced Pyrolysis Method and Nano-Crystalline Seeding Technique and Their Dielectric Properties
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概要
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This paper describes a method for fabricating dielectric BaTiO3 (BT) micropatterns. The method used in the present work is a combination of a laser-induced pyrolysis method and a nano-crystalline seeding technique. BT nano-crystalline particles used for the seeding are prepared by hydrolysis of a BT complex alkoxide. A precursor solution of a BT complex alkoxide containing the BT nano-crystalline particles and polyvinylpyrollidone (PVP) is spin-coated on a Pt substrate. Micropatterns with a line width of ca. 1–2 μm are fabricated by irradiating an Ar+ laser beam with a beam waist diameter of 0.74 μm at a laser energy density of 27 MW/cm2 and a scanning speed of 25 μm/s on the spin-coated BT films, and then stripping laser-unirradiated regions on the films with an HCl aqueous solution. The use of BT particles prepared in the presence of PVP with a small molecular weight provides clear micropatterns and high dielectric constant. The dielectric constant and dissipation factor of the micropattern fabricated at 20 vol% BT particles with an average size of 12.9 nm prepared in the presence of PVP with a molecular weight of 10000 attain 78.7 and 0.089, respectively, for a measurement frequency of 100 kHz.
- 2010-03-01
著者
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Kobayashi Yoshio
Department of Biomolecular Functional Engineering, College of Engineering, Ibaraki University
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渡辺 明
東北大多元研
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SHIMIZU Naoki
Department of Quantum Matter,ADSM,Hiroshima University
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WATANABE Akira
Institute for Chemical Reaction Science, Tohoku University
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Shimizu Naoki
Department Of Quantum Matter Adsm Hiroshima University
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NAGAO Daisuke
Department of Chemical Engineering, Graduate School of Engineering, Tohoku University
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KONNO Mikio
Department of Chemical Engineering, Graduate School of Engineering, Tohoku University
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Konno M
Department Of Chemical Engineering Graduate School Of Engineering Tohoku University
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Konno Mikio
Department Of Chemical Engineering Graduate School Of Engineering Tohoku University
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Yoshio Kobayashi
Department Of Biomolecular Functional Engineering College Of Engineering Ibaraki University
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Nagao Daisuke
Department Of Chemical Engineering Graduate School Of Engineering Tohoku University
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Shimizu Naoki
Department Of Chemical Engineering Graduate School Of Engineering Tohoku University
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Kobayashi Yoshio
Department Of Chemical Engineering Graduate School Of Engineering Tohoku University
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Watanabe Akira
Institute Of Multidisciplinary Research For Advanced Materials Tohoku University
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Watanabe Akira
Institute For Chemical Reaction Science Tohoku University
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Kobayashi Yoshio
Department Cardiovascular Science and Medicine, Chiba University Graduate School of Medicine
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